Local animal shelters, rescues and humane societies are always in need of volunteers to care for animals, organize fundraising events, perform administrative tasks, or even help to rescue pets in the wake of floods, fires and other natural disasters. Retirees with the time and space to look after an animal might consider serving as a "foster parent" until a permanent placement can be found for a homeless dog or cat. And volunteering with animals can provide a furry fix for animal lovers who no longer want the full-time commitment of a pet of their own. Pet owners might also consider having their pets certified through a pet therapy training program that enables them to visit patients in nursing homes, children's hospitals and hospice care.

Like many non-profit organizations, animal shelters also need legal advocates, grant writers and even graphic designers to help them get the word out about animal protection issues [source: Pacelle].